Calculating-machine.



J. C. WAHL.

CALCULATING MACHINE.

APPLICATION FILED MAR. 15, 19 17.

Patented Dec. 23, 1919.

. 2 SHEETSSHEET i.

J. C. WAHL.

CALCULATING MACHINE.

APPLICATION FILED MAR. 15. 1911.

Patented Dec. 23,1919.

2 SHEETS-SHEET 2L UNITEnsTAT -s PATErtT oFinon.

a well-known Wahl totalizer, therefore a will As above stated, my inventi *ing toan actuator Jon): 0'. WAHL, or CHICAGO, ILLINOIS,. ASSIGNR TO WAHL comrmior CHICAGO, 4 rumors, n .con'r'ona'rxon OF DELAWARE. 3

chines, of w hi li theftollowing is aspec'ification. My invention is an improved clear signal 10 for totali'zer and is in the nature of an improvement on a certain co-pending applicati'onof mine now-on file in-theOiiice.

The object-0f my invention is to provide an efiicient signal :for' giving .an indication of when a number hasheen comfiletely extracted from' the totali zer- -m other words, give a signal of thefact'oi the totahzer being at 0. ".In'. its preferred embodiment I have shown'my invention attached tothe not: be necessary formeto fdescribe this totalizer in detail, since it has already been described in numerous issued patents, particularly Patent No. 893,719, granteclvto me 2 5 July 21,-,190s,

- My inventignyilL be-best' understood by reference to the acco'nipanying: drawings, of which: a r r V Figure 1 is a view oftlic right side of 80 the totaliuer' with the supporting platc'removed. v

Fig. 2. is a section. along the lines 2-2 of Fig.1. p Fig. 31is asection along the lines 3-3 ofFig.1.-

' 'Fi 4 is anenlargecl view of the shutter aud ts operating mechanism, and- Fig. 5 is a perspective-view of some parts shown in the previous figures. i 'on'is shown applied to the well-known Wahl totalizer. Thistotalizer is usually :operated;1n =-con5 nection with atypewriter, to thenumeral keys of which] aregattached pull rods f .lfittitd V -.-o{ '{converting vert1 A, I rode into a difirentialijlgrotat' a e e l-= 'i a ir tie thefmaster whel camunarme-mscnmn p specification of Letters 2mm l connected .to and 3 advances with the motion of the-type) hl cw i i' e a iebr i ,7 t gears are nor llv connected to eac 20.;aiid-121, irotati'vely amt 19,17 Serial No. 154,970.

' with the carriage, and. numbers are inserted thr'eim-digit by digit,--hy the rotation of .the master wheel. a In the Wahl; machine, prior to the rotationof the master Wheel, there are certain 7 universal actions which take place upon the down stroke of any of the numeral keys. Among these actions is the counter clock- 'wise rotation of a certain master dog which has the double functionf-of securely locking the typewriter carriage during the differ- 65,

ential rotation of the master wheel, and also' of lifting any one of a setv of swinging arms rotatably mounted in the totalizer, thus 1mlocking the gear chain'of the totalizer: and v permitting the insertion of a number "in the totalizer at the particular decimal'plaoe in which the master Wheelis then engaged. A description of; the precise mech'amsnrby which these functions are accomplished fully set forth" in my hereinbefore cited patent, and I shall, therefore, start thefde scription of my present invention with'the premise that the depressionfof any of thc numeral keys of the ty ewriter rotates the master wheel a 'difi'erential amount, and that prior to said rotation the master dog is-rotated in a counter clock-wise direction t perform certain operations in the totaliz'er Referring now' to Fig. 1; the:master-Wheel.= 10 is rotatably mounted in the framevvbrk 12 on a shaft '11. Mounted."oii 'shaf t 13," also rotatably mounted in the framework 12, I is the masterdo'g 14'. Thej totalizerj "15iis mounted on- ,a traveling tru'ckflfi -whichl'isj The masterwheel I 10 --.vad jap with anyj'ojnefof"aifget.of c'a rrym ge there 'beingfone ft-said gears-" in v se.- in

vby man e tran e 'gi 1 are jjrot'atablyi' mount zsgheld betwe ju .4 v, I meshwith itsflassociated carrying. gears 'll.

Patented D 23, 191

of 'thecarrying wheels 17 connected by the transfer gears 18 or 19 at the actuated point,

leavingthe gear 17 then engaged by the master wheel 10 free to be rotated and also providing a locked gear chain to the highest which turns in the side plates '24 and The swinging arms 20 and 21 are also pro-- vided with a locking surface 29 which is adapted to be'cngaged by a locking sin-face 30 on the safety bar when the same shall 15 have been rotated by the action of anynose 9.6, the object of this arrangement being to securely lock down all of the swinging arms so obvious from the foregoing that prior to the The slmtter 3 20 and 21, except the particular arm which has been raised by the master dog 14. It IS insertion of each digit of a number inserted by the action of the typewriter numeral keys, the safetybar 27 is rotated in a counter clock-wise direction (Fig. 1) by the action of the particular swinging arm which is in mesh with the master dog 14.

Each of the carrying gears 17 has a mesh.

therewith and idle gear 31 rotatively mount; ed on a shaft 32 held between'the sideplates 24 and 25, and in its turn each of the idle gears 31 is in mesh with a gear rigid to a number disk 34, the associated gears 33 and number disks 34 being rotativel y mounted on a shaft 35 held between the sideplates 24 and The totalizer is covered by a suitable casing 36 having a window 37 therein, through which the numbers on the disks may be read.

The above described parts are all wellknown parts of the 'ahl totalizer. 1 will .now describe the parts which are peculiar to my present invention:

Rotativcly mounted on the shaft 35 is a shutter 38, which is in the form of' a bail.

supported at either end by the shaft 35. is of a width somewhat greater than the window 37, and when turned in front of said window will conceal the number wheels 34. The. right-hand edge of the shutter (Fig. 5) has in it a notch 39 which is engaged by a finger 4Q rotatively mounted on a stud 41 riveted in the side plate 25. plates 24 and 25 on a shaft 42' is a comb 43 having teeth 44, said teeth being in the plane of the gears 33. Each of the gears 33 is provided with a short tooth -15 and the numbers on the number disk 34 are so arranged that when the short tooth 453 is in a position to'be engaged by its associated comb tooth 44, the 0 will be opposite the sight opening 37. It is evident that when the zeros are all in line that'the comb 3 is at liberty to turn in a counter clock-wise direction, (Fig. 1) and Itotatably mounted in the side d ng at 0.

stand at 0, then the fact that one of the long teeth of the gear 33 being in contact with its associated comb tooth 44' will prevent the betorementioned rotation of the comb 43.

The comb 43 has on it an arm 46 to which is. attached a spring 47, which is fastened to a bar 48 supported between the totalizer sidcplates 24'and The comb 43' and its associated teeth 44 are thus urged to-rotate in a-counter clock-wise direction (Figs. 4 and 5) and are prevented'fiom so' doing except when all the short teeth 45 are in alinement, that is, when the totalizer stands at-0..

I shall now describe the means by which tliis-rotationof the comb 43 is transmitted to the finger; 40, which as above noted, serves to rotate the shutter-38. Rigid to the tooth 44 at the extreme right of the comb 43 (Fig. 5) is a epla'te 49, having a pin 50 rigidly mounted thereinn The finger 40 which, it will he recalled, is rotatively mounted on the stud 41 (Fig.5) has a slot 51 therein, which A embracesthepm50.2 Obviously, rotation of the comb -13 i n a counter clock-wise direction 'ill rcsult 'in'rot'ation' of the finger 40 in a counter clot-k-w'ise -direction, and this will result in the shutter 38 being moved in'front f'the sight openii-igjtfl. 1 This" position of the partsisshown in Figu4. T

' The tension of the spring 47 which gives the comb 43 a tendency to turn in a counter clock-wise direction Fig. 4) will be resisted by the teeth ofthe gears 43. Since this friction is undesirable whcli said gears are tunic-.1, l have provided on the plate 49 a second finger 52, which is engaged by-iingcr 53 rigid on the safety bar 27. This results in the liftingrof the comb teeth 4+ out of contact with the gcars 33 every time a numher is inserted into the totalizer, and, since it. will be rcmcmbcred that the safety bar 27 of the frictional engagement are avoided. l

consider this feature of great inqmrtance and wish to olann the same broadly.

l1: the arrangement shown it is obvious that the shutter 238 will be held out of line with the sight openingi-lT except in the event I I have colored this shuttcca bright red so as to aii'ord an cll'cctivc contrast. with the, color of the is in the totalizer and only' exhibit the totalizer number wheels when these wheels stand at 0. 'To provide for this contingency l t, have supplied the shutter 38 with a notch which similar to the notch 39. If the totalizer is assembled so that the finger 40 is engaged with the notchiiet, then the-shutter'38 will be opposite the sight opening 37 as long as there is any number in the totalizer and will disappear when the totalizer is clear. a

This latter arrangementof the shutter is used in what is known as method of checking by means'of a predetermined total. Inthis method the operator writes original items'into the totalizer but is not able to see the total of said items. After having written the original items she then writes a total which has'been given to her and writes said 'totalin the machine in a subtracting'direction. The original items have then been added into the machine and the predetermined total "of said items-subtracted from the machine; If thepredeterminedtotalis a correct total of the items which 'tlie'opera- I tor has written, the machine will then sho \'v a clear. This will give a check upon the accuracy of the first operator who handles these original items and determines thetotal thereof, and also upon the accuracy with which the second operator has written the originali'itemsand the predetermined total.

, Forfif either f the operators havemade a mistake, the sec'o'nd'mac'hine would not show clear after the second operato'r had entered theoigin l'iteins'and subtracted the predetermined to'tal. w Ma'ny changes and modifications maybe madein'fthe precise mechanism herein shown, s nce I cla1m:-

1 Ina totalizer the combination of a totalizer'including a set of gear wheels adapted tobe displaced from their normal position to represent numbers, a zero determin- ';-=-ing device". for mechanically determining contact with said gear wheels,'means for inwhen said ears are in their normal position,

means hol ing said determiningdevice in sorting a number, in said totalizer, and means for withdrawing said zero'deterinining device from contact with said gears prior to '-the insertion of a number in said totalizer.

2..In a calculating machine the combi- -nation of at'otalizer including'a set of numeral .wheels, a' zero determining device adapted to determine mechanically the zero gos'ition of said numeral wheels, means to rin said zero determining device in cooptaliz'er.

0 0 I a eration with said numeral wheels, means to msert a number in said numeral wheels, and means to move said zero determining device from its contact with said numeral wheels prior to the insertion of a number in said,

.totalizer, whereby said numeral wheels'will he-fre e from said zero determining device the insertion of a number in the to- "3. In a calculating-machine the combination' of a set of numeral wheels, means torotate' said numeral wheels, a zero determining device for said-numeral w'heels-normally' i' n' contact with said wheels, and means to move said zero determining- 'device 'froin'-'contact with said numeral wheels riorto' the rotation of said numeral-whee s. i

4. Ina calculating machine the combination of-a totalizer including a set of numeral wheels, means 'to' insert a number therein, a

zero determiningldevice adapted to contact 4 wlth saidnumeral wheels todetermme the zero position thereof," means holding} said zero determining device in contact-with s'ai wheels and means to move said zero determining device from its'ycontact; with" said wheels prior to the rotation o'f said'wheels.

. 5. In ii-calculatingmachine the combina tion of a set of numeral wheels, a set of gears rotating rigidly therewithfmeans" to rotate said numeral wheels, at -zero determiningfiethereby determining the zero position of wheels, means for bIIIIgIlXQ SaNl zero deter mining device 111 vk tontact with said wheels,

prior to the rotation'of said numeral wheels.

6. In :1 calculating machine thcconibinatlonof aset of numeral wheels and set of termining device from its contact withs'aid gears prior to the rotation of said gears; 4

gears having at least one short-teeth, a"'ze ro vice adapted to contact with-said gears'and and meansforremoving saidfzero.determin 7, mg device from lt'stontact with said gears;

"ears rigidly rotated therewith, each of said gears and means to withdraw said 'l'ero' dei 7. In a calculating'machine the ombina- 5 tion ofa set of numeral wheels, a'set'of gears rotating rigidlytherewith, said gears having at 'least one short tooth to determine the zero position thereof, a comb adapted to contact with said gears and by its contact with'said shortteeth determine'their zero position, a springnormally' holding I said comb in contact with said gears, means to rotate said gears'and'means to movesaid comb out of contact with said gears prior to the rotation ofsaid gears.

8. In a calculating machine the-combina;

tion of a' set of gears adapted tof'represent a number by their displacement fffrom the normal positiommeans to. rotate said gears,

a set of transfer gears normallyfconnectipg' said gears to thereby transfer'the tens from one of said gears totheigea ggf thanext higher order, a zero deter deviceadapted to determine the as f position of' said gears and spring to rotate'isaid zero determining device, means to withdraw said zero determining device from its contactwith said gears prior to the rotationthereo f, means to withdraw on of said transfer gears from its connected gears anda mechanism common to both of said last mentioned means to operate them;

9-. In a calculating machine the combination of a totalizer including a set of gear wheels adapted to be displacedfrom their normal position to represent numbers, a,zero determining device for'mechanically determining when said gears are in their zero porotate said numeral wheels, a zero determining device for said numeral wheels normally in contact therewith, a means to move said zero. determining deviceffrom contact with said numeral wheels-prior to the. rotation of saidnumeral wheels and restore said device to its normal position subsequent to said rotation,

11. In a caluculatmg"machine:the combi-;

nationof a totaliyer, includingfja set of numeral wheels, means to insert a' number therein, a zerodetermining device adapted to contact with said numeral'wheelsto determine the zcroposition thereof, means for holding said zero contactwith said wheels and means operated by'. said. numberinserting means to move said zero -'d etcrmining device from its contact with said wheels prior to-vthe rotation of said wheels.

12. In a calculating, machine the combi-' nation of a totalizer, including a set of numeral wheels, means to insert a number I therein, a zero determining device adapted to contact with said-numeral wheels to determine the zero Jp'o'sition thereof, meansholding said zero determii'iing.device in contact with said wheels and meai'lsoperated by said number inserting means to 'niovesaid zero determining device from its contact.

smon, a spring holding said determining- .mechanism connected .to

determining device in scribed my name. with said wheels prior to the rotation of said wheels and return said device to its normal position subsequent to'said rotation.

13. Ina calculating machine, the combination of a set of numeral wheels, means to rotate said numeral wheels, a zero determining device for said numeral Wheels normally in contact therewith, means to move said zero determining device from contact with saidn'umeral wheels prior to the rotation of said wheels, a shutter adapted to conceal said numeral wheels, and means to shift said shutter co-in cidentally with the removal of said zero determining device from said wheels.

14. In a calculating machine, the combination of a set of numeral wheels, carrying mechanism connecting said numeral wheels,

actuating mechanism adapted to insert numbers in said totalizer seriatim, a. shutter coiiperatingwith said numeral wheels, and means to rotate said shutter,-said rotating means being adapted to be attached to said shutter in either of two positions to thereby reverse thecycle of operation of said shutter and operating means.

'15. In a calculating machine, the combination of a set of numeral wheels, carrying said numeral wheels, actuating mechanism adapted to insert a number into any of said numeral wheels, wherebya number of more than one decimal place may be inserted in said numeral wheels with a less number of steps' than the number of steps represented by said number, a shuttercoiiperating with said numeral wheels, and means to operate said shutter 'coincidently with the insertion of each number into the totalizer.

16. In a calculating machine, the combination of a -setof numeral wheels, carrying mechanism connected to said numeral wheels, actuating mechanism adapted to nsert a number into any of said numeral wheels, whereby a number of more than one decimal place may be inserted in said numeral wheels with a less number of steps than the number of steps represented by said number, a shutter cooperating'with said numeral wheels, and means to'operate said shutter @incidently with the insertion of each digit of the number inserted intothe totalizer,

' In witness whereof I have hereunto sub- Jonu o. WA-HL. 

